ZOOM:

        At any time on the title screen or during play, type "TRICK" and use
        the following keys:

                        'R'___________Advance 16 levels.
                        'T'_______________Invincibility.
                        'N'__________Disable cheat mode.

        When asked to select the starting level, press 'F10'.  You can now
        start at level 30 instead of 10.